lactones

https://doi.org/10.1351/goldbook.L03439
Cyclic @E02219@ of hydroxy @C00852@, containing a 1-oxacycloalkan-2-one structure, or analogues having unsaturation or heteroatoms replacing one or more carbon atoms of the ring.
L03439.png
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1347 [Terms] [Paper]